Premium
A Sensitive Spectrophotometric Determination of Nitrite in Water and Soil
Author(s) -
Chatterjee Sukumar,
Pillai Ajai K.,
Gupta V. K.
Publication year - 2004
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200400029
Subject(s) - chemistry , nitrite , crystal violet , molar absorptivity , iodine , iodide , absorption (acoustics) , aqueous solution , triarylmethane dye , nuclear chemistry , spectrophotometry , inorganic chemistry , nitrate , chromatography , organic chemistry , medicine , physics , optics , pathology , acoustics
A highly sensitive spectrophotometric method for the determination of nitrite in water and soil has been developed. The reaction of nitrite with acidified potassium iodide to liberate iodine which oxidizes leuco‐crystal violet (LCV) to form crystal violet having absorption maxima at 590 nm forms the bases of this method. In aqueous medium the system obeys Beer's law in the range of 0.1 to 1.0 μg per 25 mL (0.004–0.04 ppm), while in an extractive system the range is 0.025–0.25 μg in 100 mL (0.00025–0.0025 ppm). The molar absorptivity and Sandell's sensitivity were found to be 1.54 × 10 6 1 mol −1 cm −1 and 44 pg cm −2 , respectively.